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Article
Publication date: 1 August 1994

Tony Ball

Provides a commentary on the inadequacy of verbal communication betweenmanagers, suggesting that this fosters distrust throughout theorganization. Advocates the need for a new…

10721

Abstract

Provides a commentary on the inadequacy of verbal communication between managers, suggesting that this fosters distrust throughout the organization. Advocates the need for a new breed of manager, with a different set of concepts and perspectives, and concludes that the role of management must be reversed if companies are to become world leaders.

Details

Management Development Review, vol. 7 no. 4
Type: Research Article
ISSN: 0962-2519

Keywords

Article
Publication date: 1 May 1982

MAKE no mistake about it, robots are not just here to stay static: their use will extend far beyond the very dreams of their earliest inventors, and who they were is lost under…

Abstract

MAKE no mistake about it, robots are not just here to stay static: their use will extend far beyond the very dreams of their earliest inventors, and who they were is lost under the veils of age‐long antiquity.

Details

Work Study, vol. 31 no. 5
Type: Research Article
ISSN: 0043-8022

Article
Publication date: 1 March 1983

Recently, two thousand representatives from farming, horticulture, manufacturing, processing, wholesaling and retailing of food met in the Conference Centre at the Barbican to…

Abstract

Recently, two thousand representatives from farming, horticulture, manufacturing, processing, wholesaling and retailing of food met in the Conference Centre at the Barbican to hear about plans to launch a massive marketing campaign for British food

Details

Nutrition & Food Science, vol. 83 no. 3
Type: Research Article
ISSN: 0034-6659

Article
Publication date: 1 August 1999

John Lau and Tony Chen

The effect of heat‐spreader sizes on the temperature distribution, thermal resistance, and cooling power of a set of cost‐effective cavity‐down plastic ball grid array (PBGA…

Abstract

The effect of heat‐spreader sizes on the temperature distribution, thermal resistance, and cooling power of a set of cost‐effective cavity‐down plastic ball grid array (PBGA) packages assembled on an FR‐4 epoxy glass printed circuit board (PCB) is presented. The sizes of these packages are 35 × 35mm and 40 × 40mm and with four and five rows of solder balls.

Details

Microelectronics International, vol. 16 no. 2
Type: Research Article
ISSN: 1356-5362

Keywords

Article
Publication date: 1 December 1999

Tony Huang and Joe Chu

A study was conducted to examine the sensitivity of solder joint integrity for PBGA assembly and post rework process yields to the change of the solder ball coplanarity…

253

Abstract

A study was conducted to examine the sensitivity of solder joint integrity for PBGA assembly and post rework process yields to the change of the solder ball coplanarity specification from 0.15mm to 0.20mm as well as to increase the level of confidence with respect to the specification change. The study considered the following experimental variables: solder ball coplanarity; stencil thickness and aperture design; whether the assembly also experiences a wave soldering process; the rework method, i.e. whether there is dispensing of solder paste or just a flux. Electrical continuity tests were performed after PBGA assembly and rework. Accelerated thermal cycling and thermal shock tests were then used to evaluate the solder joint reliability. Additionally, standoff heights of PBGA solder joints were measured through cross sectioning samples. Statistical comparisons of the mean standoff height between different PBGA coplanarity groups, where different experiment variables were applied, allowed for determination of the variation of BGA solder joint integrity.

Details

Soldering & Surface Mount Technology, vol. 11 no. 3
Type: Research Article
ISSN: 0954-0911

Keywords

Article
Publication date: 19 December 2019

De-Xing Zheng, W.F. Chen, Guanyun Xiao and Dateng Zheng

This paper aims to devote to the experimental analysis and modeling on the heat generation of angular contact ball bearings under vibration.

Abstract

Purpose

This paper aims to devote to the experimental analysis and modeling on the heat generation of angular contact ball bearings under vibration.

Design/methodology/approach

The experiments about vibration effect on bearing temperature are implemented. To explore the causes of bearing temperature rise, the shaft-bearing system is first simplified to a forced vibration model to analyze the bearing loads in vibration. Next, the vibratory-induced additional load is proposed and the spin power loss of balls is re-derived under vibration. The vibration-induced heat is integrated into a novel forecasting model of bearing power loss. For validation, the muti-node model for angular contact ball bearings is referred to create the thermal network of spindle front bearing, and then the contrast and discussion is done.

Findings

The simulation and test results both indicate that more energy is expended and more heat is generated with vibration. And the further quantitative comparisons between simulation results and experimental values of bearing temperature demonstrate the rationality and availability of constructed model on bearing heat generation.

Originality/value

The vibration-induced additional load is proposed and modeled, and the novel forecasting model for heat generation for high-speed angular contact ball bearings with vibration is constructed and validated.

Details

Industrial Lubrication and Tribology, vol. 72 no. 5
Type: Research Article
ISSN: 0036-8792

Keywords

Article
Publication date: 1 June 1999

John H. Lau, Tony Chen and Tai‐Yu Chou

A family of cavity‐down plastic ball grid array (PBGA) packages have been designed by split via connection (SVC) and split wrap around (SWA) methods. Because of the special…

Abstract

A family of cavity‐down plastic ball grid array (PBGA) packages have been designed by split via connection (SVC) and split wrap around (SWA) methods. Because of the special designs, these packages consist of a single core of organic material and two‐metal layers of copper and are manufactured with the conventional printed circuit board (PCB) process at very low cost. The electrical performances of the packages are studied by both numerical simulations and experimental measurements. Parasitic parameters are extracted from time domain reflectometer (TDR) and time domain transmission (TDT) measurements. Cross‐talk and simultaneous switch output (SSO) noise of the packages are also investigated.

Details

Circuit World, vol. 25 no. 2
Type: Research Article
ISSN: 0305-6120

Keywords

Article
Publication date: 1 April 1984

Rochelle Yates

What was the older daughter's name on Father Knows Best? Who hit the ball that Willy Mays miraculously caught in the 1954 World Series? Who was Goldwater's running mate in 1964…

Abstract

What was the older daughter's name on Father Knows Best? Who hit the ball that Willy Mays miraculously caught in the 1954 World Series? Who was Goldwater's running mate in 1964? These questions are less than earth‐shattering; in fact they are labeled as ‘trivia.’ But that does not mean that they are unimportant. Ask any librarian who has ever spent a half‐hour cross‐checking lists to find the one performer who won the Oscar, Emmy, Tony, and Grammy.

Details

Reference Services Review, vol. 12 no. 4
Type: Research Article
ISSN: 0090-7324

Article
Publication date: 2 February 2015

Tony Kang, Mark Kohlbeck and Yong Yoo

The purpose of this paper is to investigate international variability in the pricing of accounting information using ex ante cost of equity capital estimates. Prior literature…

2479

Abstract

Purpose

The purpose of this paper is to investigate international variability in the pricing of accounting information using ex ante cost of equity capital estimates. Prior literature shows that financial statement amounts are relevant for investor decisions only when there is appropriate economic and legal infrastructure (Ball, 2001).

Design/methodology/approach

Accrual quality and accounting loss are focussed upon as indicators of firm risk in financial statements.

Findings

The evidence suggests that accounting information is factored into ex ante cost of equity capital in countries with strong economic and legal infrastructures but not in those with weak infrastructures. Findings support Ball’s notion that the role financial reporting plays in a capital market depends on the strength of economic and legal infrastructure.

Originality/value

Findings support Ball’s notion that the role financial reporting plays in a capital market depends on the strength of economic and legal infrastructure.

Details

Pacific Accounting Review, vol. 27 no. 1
Type: Research Article
ISSN: 0114-0582

Keywords

Book part
Publication date: 22 April 2003

Bob Jeffrey

The rise of a performativity discourse in education in England emanates from the importation of an economic ‘market’ structure for schools in order to improve the effectiveness…

Abstract

The rise of a performativity discourse in education in England emanates from the importation of an economic ‘market’ structure for schools in order to improve the effectiveness and efficiency of the outputs of learning and to increase the opportunity of choice for the ‘consumers’ of education (Ball, 1998). Institutions focus their policies and practice, on improving performance and survival to maintain and develop their market share. This is due to the competitive nature of a market structure. The performativity criterion of efficiency and effectiveness is an optimisation of the relationship between input and output (Lyotard, 1979). In the case of education this means both ensuring a favourable qualitative award from a national inspection service and raising the achievement levels of pupils in national tests to ensure a high position in published tables of educational performance. High ratings on these two performativity indicators improve a school’s attraction to parents and students in the educational market place. This results in improved resources, increasing the opportunity for the school to be more selective about the students it accepts and the quality of the teachers it employs.

Details

Investigating Educational Policy Through Ethnography
Type: Book
ISBN: 978-0-76231-018-0

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